CVE-2016-6252 · cross-distro fix matrix

CVE-2016-6252: Integer overflow in shadow 4.2.1 allows local users to gain privileges via crafted input to newuidmap.

Affects 8 Linux releases across 8 (distro × package) combinations.

Fix per ecosystem

Each block below is a distro release where CVE-2016-6252 has a known fix. Run the listed command on that distro to remediate.

Debian bullseye

Source: Debian Security Tracker

shadow→ fixed in1:4.4-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y shadow
```

Debian bookworm

Source: Debian Security Tracker

shadow→ fixed in1:4.4-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y shadow
```

Debian trixie

Source: Debian Security Tracker

shadow→ fixed in1:4.4-1urgency: not yet assigned
```
sudo apt-get install --only-upgrade -y shadow
```

Alpine v3.20

Source: Alpine secdb

shadow→ fixed in4.2.1-r7
```
apk update && apk add --upgrade shadow
```

Alpine v3.21

Source: Alpine secdb

shadow→ fixed in4.2.1-r7
```
apk update && apk add --upgrade shadow
```

Alpine edge

Source: Alpine secdb

shadow→ fixed in4.2.1-r7
```
apk update && apk add --upgrade shadow
```

Alpine v3.18

Source: Alpine secdb

shadow→ fixed in4.2.1-r7
```
apk update && apk add --upgrade shadow
```

Alpine v3.19

Source: Alpine secdb

shadow→ fixed in4.2.1-r7
```
apk update && apk add --upgrade shadow
```

Are YOU affected by CVE-2016-6252?

5-second check on your actual server. Reads /etc/os-release, uname -r, and the distro's package manager; matches against this same cross-source index live.

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